I got fitted for T-200 Irons .5 long & 2 degrees up. My fitter informed me that because they are 1/2' longer the heads will/could feel heavier so I can order the lighter T-200 head instead of the normal T-200 heads. He said it's based on swing weight. The clubs being longer it can make the head feel heavier & that it was up to me if I wanted that feeling or a typical feeling by going to the lighter iron heads. I wanted the most traditional feel and didn't want to possibly slow down my swing with heavier feel so I went with the lighter heads.
Never knew that about getting clubs a bit longer. Didn't even know they made different weighted iron heads for that fact......
DM